B.  The panels are at the door area in each cargo compartment. The panels are of different dimensions.
 TASK 25-53-15-004-001
 2.  Ball-Transfer Panel Removal (Fig. 401)___________________________
 A.  Special Tools and Equipment
 (1)  3PRE65B00040 - Lower Cargo Door Opening Safety Barrier
 B.  References
 (1)  
24-22-00/201, Manual Control

 (2)  
52-34-00/001, Forward/Aft Cargo Doors

 (3)  
IPC 25-53-15

 C.  Access
 (1)  Location Zone
 100 Lower Half of Fuselage

 D.  Prepare for the Removal
 S 864-002
 (1)  
Supply electrical ground power (Ref 24-22-00/201).

 S 014-003

 (2)  
Open the cargo compartment door (Ref 52-34-00/001).

 S 494-004
 WARNING: BE CAREFUL WHEN YOU ARE NEAR THE OPENING OF THE CARGO
_______ COMPARTMENT DOOR. INSTALL A SAFETY BARRIER (3PRE65B00040) ACROSS THE OPENING OF THE DOOR UNLESS AN ACCESS STAND IS AT THE DOOR. INJURY TO PERSONS CAN OCCUR IF THEY FALL THROUGH THE OPENING OF THE DOOR.
 (3)  
Install a safety barrier (3PRE65B00040) across the opening of the cargo compartment door if it is necessary.

 S 864-005

 (4)  
Push the CAUTION switch-light on the cargo control panel until it starts to flash.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 25-53-15
 ALL  ú ú 02 Page 401 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 E. Remove the Panel
 S 034-007
 (1)  
Remove the bolts and washers which hold the panel to the cargo floor structure.

 S 024-008

 (2)
Lift the panel to remove it from the cargo floor structure.

 TASK 25-53-15-404-009
 3.  Ball-Transfer Panel Installation (Fig. 401)________________________________
 A. Special Tools and Equipment
 (1)  3PRE65B00040 - Lower Cargo Door Opening Safety Barrier
 B. References
 (1)  
24-22-00/201, Manual Control

 (2)  
52-34-00/001, Forward/Aft Cargo Doors

 (3)  
IPC 25-53-15

 C. Access
 (1)  Location Zone
 100 Lower Half of Fuselage

 D. Prepare for the Installation
 S 864-010
 (1)  
Supply electrical ground power (Ref 24-22-00/201).

 S 014-011

 (2)  
Open the cargo compartment door (Ref 52-34-00/001).

 S 494-012
 WARNING: BE CAREFUL WHEN YOU ARE NEAR THE OPENING OF THE CARGO
_______ COMPARTMENT DOOR. INSTALL A SAFETY BARRIER (3PRE65B00040) ACROSS THE OPENING OF THE DOOR UNLESS AN ACCESS STAND IS AT THE DOOR. INJURY TO PERSONS CAN OCCUR IF THEY FALL THROUGH THE OPENING OF THE DOOR.
 (3)  
Install a safety barrier (3PRE65B00040) across the opening of the cargo compartment door if it is necessary.

 S 864-013

 (4)  
Push the CAUTION switch-light on the cargo control panel until it starts to flash.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 25-53-15
 ALL  ú ú 01 Page 402 ú Oct 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 E. Install the Panel
 S 424-014
 (1)  
Put the panel on the cargo floor structure.

 S 434-015

 (2)  
Install the bolts and washers which attach the panel to the cargo floor structure.

 F. Put the Airplane Back to Its Usual Condition
 S 864-016
 (1)  
Push the CAUTION switch-light on the cargo control panel until it does not flash.

 S 094-017

 (2)  
Remove the safety barrier (3PRE65B00040) from the opening of the cargo compartment door if it is installed.

 S 414-018

 (3)  
Close the cargo compartment door (Ref 52-34-00/001).

 S 864-020

 (4)  
Remove the electrical ground power if it is not necessary (Ref 24-22-00/201).
　
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